FNUS75 KRIW 181157
FWSRIW

SPOT FORECAST FOR MCCAIN...TETON INTERAGENCY DISPATCH
NATIONAL WEATHER SERVICE RIVERTON WY
557 AM MDT WED AUG 18 2010

FORECAST IS BASED ON REQUEST TIME OF 2020 MDT ON AUGUST 17.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...ISOLATED SHOWERS AND THUNDERSTORMS ARE POSSIBLE
NEAR THE FIRE TODAY AND TONIGHT. BREEZY WEST TO SOUTHWEST WINDS
ARE EXPECTED TO DEVELOP IN THE EARLY AFTERNOON...ESPECIALLY AT
RIDGE TOP AND EXPOSED AREAS. ISOLATED THUNDERSTORMS WILL BE
POSSIBLE AGAIN ON THURSDAY.

...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS...
...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT...

FORECASTER...AR/WM

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
MAX TEMPERATURE.....72 TO 77.
MIN HUMIDITY........20 TO 25 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 3 TO 5 MPH UNTIL NOON. THEN
                    WEST AT 4 TO 8 MPH DURING THE AFTERNOON. HIGHER
                    WINDS IN EXPOSED AREAS. GUSTS AROUND 15 MPH AT
                    TIMES. GUSTY AND ERRATIC WINDS TO 40 MPH EXPECTED
                    NEAR ANY THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTH AT 5 TO 10 MPH IN THE MORNING. WIND SHIFTING
                    TO THE SOUTHWEST TO WEST AFTER 100 PM AT 15 TO 20 MPH.
                    GUSTY AND ERRATIC WINDS TO 40 MPH EXPECTED
                    NEAR ANY THUNDERSTORMS.
LAL.................2.
CWR.................3 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 8500 TO 9000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST AT 20 TO 25 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....INCREASING TO GOOD BY NOON AND THEN EXCELLENT
                    AFTER 200 PM.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
                    THUNDERSTORMS.
MIN TEMPERATURE.....45-50.
MAX HUMIDITY........60 TO 65 PERCENT.
WIND (20 FT)........WEST AT 5 TO 8 MPH UNTIL SUNSET...THEN BECOMING
                    DOWNSLOPE/DOWNVALLEY AT 3 TO 6 MPH.
                    GUSTY AND ERRATIC WINDS TO 30 MPH EXPECTED NEAR
                    THUNDERSTORMS.
RIDGE TOP WINDS.....WEST TO SOUTHWEST 15 TO 20 MPH UNTIL SUNSET.
                    THEN WEST TO SOUTHWEST AROUND 10 MPH BY MIDNIGHT.
LAL.................2.
CWR.................3 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 2000 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 15 MPH UNTIL SUNSET...THEN WEST TO SOUTHWEST
                    AROUND 10 MPH AFTER MIDNIGHT.
SMOKE DISPERSAL.....EXCELLENT UNTIL SUNSET...THEN DECREASING TO FAIR
                    BY MIDNIGHT...THEN BECOMING POOR AFTER MIDNIGHT.

.THURSDAY...
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
MAX TEMPERATURE.....62 TO 67.
MIN HUMIDITY........25 TO 30 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 3 TO 6 MPH IN THE MORNING.
                    WEST AT 5 TO 9 MPH IN THE AFTERNOON.
                    GUSTY AND ERRATIC WINDS TO 35 MPH EXPECTED
                    NEAR ANY THUNDERSTORMS.
RIDGE TOP WINDS.....WEST TO SOUTHWEST 5 TO 10 MPH IN THE MORNING.
                    WEST AT 15 TO 20 MPH IN THE AFTERNOON.
LAL.................2.
CWR.................3 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 8000 TO 8500 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST TO SOUTHWEST AT 5 TO 10 MPH IN THE MORNING.
                    WEST 15 TO 20 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....INCREASING TO GOOD IN THE MORNING...THEN
                    BECOMING EXCELLENT IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.THURSDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 40S. WINDS
GENERALLY LESS THAN 10 MPH.

.FRIDAY...MOSTLY CLEAR. HIGHS IN THE UPPER 60S. WINDS GENERALLY
LESS THAN 10 MPH.

.SATURDAY...MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE LOWER 70S.
WINDS GENERALLY LESS THAN 10 MPH.

.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 60S.
SOUTHWEST WINDS AROUND 12 MPH.

$$

FORECASTER...ROSS/MURRELL
REQUESTED BY...TIDC
REASON FOR REQUEST...WILDFIRE
.TAG 20100817.MCCAI.01/RIW